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To ALL WHoM 1T MAY eoNcERN;

Be it known that AI, JAMES M. KEEP, of the city-of New York, in theState and county of New York, haveA invented a new and useful improvedFastener for. Papers, Belting, Fabrics, etc., of the kind commonly usedfor securing together the leaves of manuscripts, lega-l, governmental,and Patent Office documents, music, ete., and which is also applicableto other purposes where a permanent fastener is required, and that thefollowing is a full, clear, and exact description of my invention,reference being had to the drawings accompanying and form ing part ofthese specifications, by means of which my invention may bedistinguished from all others of. the same class. i l

My invention consists in the constructing, in a manner to he hereinafterdescribed, of a duplex button7 or fastener, composed of two separateparts, as shown at figs. 1 and 2, of any desired form or design, and ofany suitable material, having upon its upper or male disk orplate a tubecapable of Vboing passed through a hole in the papers or other materialsto be united, and turned or clinched in a receptacle prepared for it inthe lower or female disk or plate, which latter is to be provided with aconical-shaped protubcrance on its inner side, and an inner plate,between which and by means of the conical-shaped protuberanee theentering end of the tube of the male disk is spread apa-rt and firmlyclinched, thus uniting the two portions of the duplex button orfastener, and firmly securing together the sheets of paper or othermaterial to which it may be applied.

The object of my invention is to furnish a neat and convenient fastener,capable of securing and uniting the leaves of manuscripts, printed o1'written documents, music, etc., belting and various fabrics, withoutrequiring the use of the press or other means now employed, the pressureof the fingers or a slight blow from any convenient instrument beingsuicient to secure the desired result; and which will at the same timepresent an ornamental appearance. In the plate of drawings accompanyingrthese specifications- Figures 1 and 2 represent a perspective view ofthe two portions, male and female, of my ""duplex button or fastener. t

Figure 3 is a central vertical section of the saine, and its positionwhen in use.v

Fig. 1 shows the upper or male portion of the fastener, the plate A'beingY of a convex form,from the centre of which projects the tube B,whose sides are split to allow of its being spread open. From theinnersicle ofthe female disk or plate C, tig. 2, projects theconical-shaped protubcrance D. On the inner side of this disk also, andcovering the protubcrance D in such a manner as to leave a, narrow spacebetween their surfaces, the plato E, having at its centre, andimmediately over the point of the protuberance D, the orifice F, isfirmly soldered or votherwise permanently attached. Now it will bereadily seen that when the tube B is passed through an open ing in thepapers to be united, and introduced into the orifice F in the plate E,its sides will be spread apart upon the wedge D, and forced down underthe inner plate E. When the disks A and C are brought as closelytogether as the intervening substance will admit, the tube B will havebecome effectually clinched, as shown at fig. 3, and it will be foundimpossible to displace the articles thus fastened, or any one of them,without tearing them or destroying the fastener.

The following I claim as my invention, and desire to secure by LettersPatent:

The plate A, provided with a divided tube, B, when used in combination`with the plate C, provided with the conical'protuberanee D and the innerplate E, in which is formed an opening, F, to receive the tube B, thecone4 D serving to' spread and secure the sections ofthe divided tubebeneath the plate E, as and for the purpose specified.

y J. M. KEEP.

Witnesses:

GEO. F. STEVENS, H. P. REYNOLDS.

